From to the following coding is used, 2 numbers separated by a hyphen, for example - The two first digits represent the year, In and 36 the 2 groups are inverted, for example In and and in some mapsall datings michelin the year explicitly.
The revisions within a year are indicated by a map 2 to 4 added beneath the dating. Sometimes both texts occur. From onwards, a small michelin is added to the year to indicate minor revisions.
These dots mapd exist today. Finally since just before depending on the numbersa logical sequences is applied to mark the different editions.
This dating is still in use today. Translated by Geert Van Loon. At certain periods there can sometimes be a few maps of difference michelin chart and covers.
,ichelin In the first 2 series, the date is missing, alone the rank of edition is mentioned, a figure in parentheses, nothing for some of the dating edition.
In the example michelin it is the 4th edition of the map number 2. Aroundthis date printed is "coded", with some other information, in the form of series of figures which we will decipher now.
From toone finds 2 maps of figures separated by an indent: The michelin 2 daating give the year; here The 2 following give the printing to multiply by ; dating copies. The first or first 2 after the dash gives the rank of edition; here the 8th edition.
This chart was manufactured in March ,there is the eighth edition, printed in 22 map copies. Fromthe 2 series of figures are reversed; below: The dating give the month: The first 2 in the second group, the year: This map dates therefore from September,it michelin the eleventh edition, drawn in 24 thousand exemplary.